A backlash against Australia’s national census is gathering momentum with lawmakers joining calls to boycott Tuesday’s population count amid concern data gathered will be used to build wide-ranging profiles of individuals and violate their right to privacy.

Nick Xenophon, who leads a minority party in parliament, is refusing to provide his name to the compulsory census and thus won’t be able to submit a completed document, risking a fine of A$180 ($138) a day. Other lawmakers , including Greens Senator Sarah Hanson-Young, have also threatened to withhold their names.